Double-acting pump



J.D. BRADY DOUBLE ACTING lPUMP v`lune 24.

Filed sept. 21, 1922 Patented June 24, 1924.

UNITED sT-,aiTuski'f TOI-IN D. BRADY, OF EL DORADO, ARKANSAS;

DOUBLE-ACTING PUMP.

Application med 'september 21, 1922. serial No."5s9,'531.

TQaZZ whom t may concern.'

VBe it known that I, Jo'HN D. Bizard?,l a citizen of the United States, residing at El Dorado, in the county of Union and State 'of Arkansas, have invented an Improved Double-Acting Pump, Vof which the followingis a specification, V

This invention relates to 'incclnrnis'm` for liftingV a liquid, as il or Water, from fdeep vWells. Such Wells are usually drilled to a substantial depth, cased to prevent-'seepage andV caving of the' Walls, further drilled `of smaller diameter through such casinguntil near the desired stratum, a second string of pipeinserted to case the hole fromv bottom to top, and drilling continued into the 'desired stratum or pay sand-L From 'thel'ajst drilled, uncased portion of the" tvell, Afluid maybe drawn to the surface through' 'a pipe having attached to the lover end thereof a pumping barrel and cooperatingparts em'- bodying my improvements. l Y

Primary objects of my invention are to fin- V crease thel elciency of pumping apparatus by providing 'for thel introduction-fof liquid 'to the barrel of the pump both 'above and below the reciprocating'valve so as to secure the discharge of'liquid at the top of the vv'ell on both strokes andv substantially increase the amount of liquid delivered; to ydecrease the churning action of the pumping mechanism Which commonly causes the production of' B; S, and to minimize 'the difficulties commonly experienced from' sand or grit settling around the cups lof the travelingvalve mechanism and troubles dueto valves being Aheld open-by gas.

invention is vcharacterized by a Working barrel having means Afor trapping therein fluid Ion opposite sides of a re'ciprocable piston, in combination with a discharge tube, and valve mechanism for connecting' said tube with said barrel on opposite sides of the piston alternately whereby liquid is delivered lfrom the barrel tothe tube upofni each stroke and is discharged from the Well upon each stroke, the discharge 'tube 'preferably supportingand effecting the operation ofthe piston and valve mechanism. Y, v

The characteristic features of m'yvinvenltion Will more fully appear from the following description of a preferred embodiment thereof and the accompanying drawings in illustration of the-same. l

In the accompanying drawings, Fig. lI is a diagrammatic illustration 'of av deepfvvell l having inserted Atherein apparatus 'embodyn'e my invention.; Fig. 21S a iongauinn sectional Viewb 'of `my vimproved pumping mechanism; Fig. 3 ijs an enlarged longitudi# nal sectional View through the Vvalve 'mechan ism Vfixed to the lower end of a tube 'by fWhic-h [suchY valve mechanism is op'eratedlan'd through ywhich liqliid is lift-ed; Fig. 4" lis an enlarged'vertical sectional'viev ofthe valve by which :fluid is* admitted to and trapped in the upper part of the \vorking` `barrel; Fig.` is afsectional `View taken 'on the line X15X Vof Flg. 4; Fig. .6 is a sectional vie'w taken on the line 'GXLX of Fig. 4;Fig. is c toplof the Well, has connected Withthe loiver end thereof fa barrel of slightlysmaller internal' diameter than the internal diameter of thej tubing and' comprising the vsections 2 and '3` connected .by tli'e cylindrical valve body .4. i

checks 6 .permitting .passage of 'fluidi "from the vvellintov the barrel,l 'and preventing vreverse l'lovv, vanda valve ,7 vXed kto thegbottom of the barrel `and controlled :by the: ball check V8 permits l'loyv of fluid from the Well into the` lower part of the barrel ya'nd'pre- 'ventsreverseflow'.`

The top of the barrel isv sealed by a packer .valve 9 provided with cups l0, the; top {of the pa'ckerfbeing of such diameter asto pass through lthe casingl butengage the vtopI of ytheWo'rkin,c j barre i Y A vstring of sucker rods 11', reciprocable in the tubing lfhas'sec'ured thereto vavalve casing l2 from which depends a `tube 113 Whose, outlet iscontrolled; by a ball check 14. The' tube lfextends ythrough the y packer valve `9` and cups" 1.0 into theba'rreland has lfixed Vthereto, the packing oupsl' engaging the inner surface of a small barrel 1.6 fixed to the top of the packer 9, whereby the'return 'to the vvorking barrel 2, offfiui'd discharged .to the tubing l from the'tube 13 is prevented.

The valve casing contains 'the i ports orV passages' 'controlled by the ball To the lower end of the tube 13 is secured a valve mechanism 16 into which" is screwed the tube 17 having tubular packing cups 13 clamped in place thereon by nuts 14, thereby forming a piston reciprocable in the barrel to draw fluid into the chambers formed in the opposite ends thereof and force the trapped fluid into the tube 13 through the valve mechanism 16.

This valve mechanism comprises a housing 18 containing a chamber 19 communieating with the barrel below the piston through the tube 17 and port 2O controlled by a ball check 21 and discharging through the axial passages or ports 22; and a second chamber 23 separated from the chamber 19 by the diaphragm 24, communicating with the barrel above the piston through the radial passages or ports 25 and discharging through the port 26. A second housing 27 `is screwed on the threaded boss 28 of the housing 18 and is provided with a seat 29 for a ball check 30 for controlling communication between the chamber 23 and the passage 31 in the housing 27 which communicates through the coupling 32 with the tube 13. A pin 33 across` the passage 31 prevents the ejection of the ball check 30 therefrom. Axial passages 22 in the housing 27 register with the ports 22 to permit discharge from the chamber 19 to the coupling 32 and tube 13.

It will be understood that in the installation of my apparatus, the barrel, with the valve mechanisms 4 and 7 attachedY thereto, is connected with the tubing 1 before it is lowered into the well. l/Vhen the barrel has reached the proper depth, the tubing 1 is anchored at the top of the well, and the top closure for the barrel and reciprocatory parts of the pump are lowered together on the end of a string of sucker rods. When the packing 9 and 10 is seated in the top of the barrel, the piston and valve mechanism 16 is lowered to working position and reciprocated through the reciprocation of the sucker rods.

On the down stroke of the piston, fluid which has entered the barrel through the valve 7 is forced through the tube 1% past the valve 21, through the chamber 19, axial passages 22, 22', coupling 32, tube 13, valve 12, into the tubing 1; the valve 30 remaining seated during this operation to prevent discharge of fluid through the ports 25 to the barrel above thepiston. During the downward stroke of the piston, the valve 8 remains seated to prevent escape of iuid from the barrel to the well, while the valves 6 are unseated and liquid is drawn'by suction from the well into the barrel above the piston. l

Upon the up stroke ofthe piston, the valve 8 is unseated to admit fluid to the barrel below the piston, and the valves 5 Lacasse are seated to prevent return flow to the well of fluid in the barrel above the piston, such fluid being forced through the radial ports 25, chamber 23, past the valve 30, through the passage 31, coupling 32, tube 13, past the valve 14, into the tubing 1, from which a substantially continuous stream is discharged.

Having claim 1. In a pump, the combination with a barrel, of a piston having a passage therethrough, a valve housing fixed to said piston at its upper end and adapted to communicate with said passage, a valve carried by said housing for preventing reverse flow through said piston, a second valve housing fixed to said housing first named, a valve for controlling the liow from said housing second named, one or more passages connecting said housings around said valve second named, one or more passages connecting said housing second named with said barrel, a tube fixed to and communicating with said housing second named, and a non-return valve carried by said tube to prevent reverse flow therethrough to said housing second named.

2. ln a pump mechanism a hollow piston having an upper screw threaded end, a valve housing detachably connected to said screw threaded end and providing a chamber therein and a valve seat, a valve resting by gravity on said valve seat within said chamber, said housin providing passageways extending upwar ly therethrough from said chamber and providing an upper screw threaded extension having a second chamber, said housing having ducts radially extending from the outside portion of said housing to said second chamber, and a second housing upwardly carried by the screw threaded extension at the top of said first mentioned housing providing a chamber therein and a valve seat, a valve resting by gravity on said valve seat, said second housing having passageways upwardly therein adapted to align with the first mentioned passageways of said first mentioned housing to communicate the chamber of said second mentioned housing with the first mentioned chamber of said first mentioned housing.

3. In a well pump the combination of a working barrel, valve means for admitting liquid from exterior of the barrel to the barrel at a certain level and preventing return flow of the liquid from the barrel, a second valve means above the first mentioned valve means for admitting a liquid from the exterior of the barrel to the barrel and preventing return flow of the liquid from the barrel, a hollow tube reciprocable in thev barrel, a closure in the barrel above the second mentioned yvalve means and thru which the tube passes in a liquid sealed condescribed my invention, l

neotion or reeiprooation, piston means carthe tube to act in order to admit liquid to ried by the tube above the closure, a nonthe tube and force it upwardly in the tube return valve cooperating over the outlet end to the non-return valve at the top of said 10 at the top of said tube above said pistonl tube.

b' means, and valve means carried by the tube In testimony whereof I have hereunto set between the first and second mentioned my name this 16th day of September, 1922. valve means adapted upon each stroke of JOHN D. BRADY. 

